Lucio Ridolfi is a married man but is complicated by many small quirks, including the fear of any unforeseen situation that could put him in difficulty. During the Christmas period he leaves for the holidays for Sestriere together with his brotherly friend Riccardo, with their respective spouses. During the journey, first on the train and then in the hotel, Lucio runs into Helen, a beautiful blonde girl who seems to show interest in her gallantry; from that moment on, however, Lucio's life became a succession of shootings and chases.